/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: 123
 * Date: 2023-06-02
 * Time: 21:29
 */
public class Test {
    public static void main(String[] args) {
        MyStack myStack = new MyStack() ;
          myStack.push(1);
          myStack.push(2);
          myStack.top() ;
          myStack.push(3);
          myStack.top() ;
    }
}
